/*
 * Copyright (c) 1992, Brian Berliner and Jeff Polk
 * Copyright (c) 1989-1992, Brian Berliner
 * 
 * You may distribute under the terms of the GNU General Public License as
 * specified in the README file that comes with the CVS 1.4 kit.
 * 
 * Tag
 * 
 * Add or delete a symbolic name to an RCS file, or a collection of RCS files.
 * Uses the checked out revision in the current directory.
 */

#include "cvs.h"

#ifndef lint
static char rcsid[] = "$CVSid: @(#)tag.c 1.60 94/09/30 $";
USE(rcsid);
#endif

static Dtype tag_dirproc PROTO((char *dir, char *repos, char *update_dir));
static int tag_fileproc PROTO((char *file, char *update_dir,
			 char *repository, List * entries,
			 List * srcfiles));

static char *symtag;
static int delete;			/* adding a tag by default */
static int branch_mode;			/* make an automagic "branch" tag */
static int local;			/* recursive by default */
static int force_tag_move;		/* don't force tag to move by default */

static char *tag_usage[] =
{
    "Usage: %s %s [-QlRqF] [-b] [-d] tag [files...]\n",
    "\t-Q\tReally quiet.\n",
    "\t-l\tLocal directory only, not recursive.\n",
    "\t-R\tProcess directories recursively.\n",
    "\t-q\tSomewhat quiet.\n",
    "\t-d\tDelete the given Tag.\n",
    "\t-b\tMake the tag a \"branch\" tag, allowing concurrent development.\n",
    "\t-F\tMove tag if it already exists\n",
    NULL
};

int
tag (argc, argv)
    int argc;
    char *argv[];
{
    int c;
    int err = 0;

    if (argc == -1)
	usage (tag_usage);

    optind = 1;
    while ((c = getopt (argc, argv, "FQqlRdb")) != -1)
    {
	switch (c)
	{
	    case 'Q':
		really_quiet = 1;
		/* FALL THROUGH */
	    case 'q':
		quiet = 1;
		break;
	    case 'l':
		local = 1;
		break;
	    case 'R':
		local = 0;
		break;
	    case 'd':
		delete = 1;
		break;
	    case 'b':
		branch_mode = 1;
		break;
            case 'F':
		force_tag_move = 1;
		break;
	    case '?':
	    default:
		usage (tag_usage);
		break;
	}
    }
    argc -= optind;
    argv += optind;

    if (argc == 0)
	usage (tag_usage);
    symtag = argv[0];
    argc--;
    argv++;

    if (delete && branch_mode)
	error (0, 0, "warning: -b ignored with -d options");
    RCS_check_tag (symtag);

    if (client_active)
    {
	/* We're the client side.  Fire up the remote server.  */
	start_server ();
	
	ign_setup ();

	if (local)
	    if (fprintf (to_server, "Argument -l\n") == EOF)
		error (1, errno, "writing to server");
	if (quiet)
	    if (fprintf (to_server, "Argument -q\n") == EOF)
		error (1, errno, "writing to server");
	if (really_quiet)
	    if (fprintf (to_server, "Argument -Q\n") == EOF)
		error (1, errno, "writing to server");
	if (delete)
	    if (fprintf (to_server, "Argument -d\n") == EOF)
		error (1, errno, "writing to server");
	if (branch_mode)
	    if (fprintf (to_server, "Argument -b\n") == EOF)
		error (1, errno, "writing to server");
	if (force_tag_move)
	    if (fprintf (to_server, "Argument -F\n") == EOF)
		error (1, errno, "writing to server");

	send_arg (symtag);

#if 0
	/* FIXME:  We shouldn't have to send current files, but I'm not sure
	   whether it works.  So send the files --
	   it's slower but it works.  */
	send_file_names (argc, argv);
#else
	send_files (argc, argv, local, 0);
#endif
	if (fprintf (to_server, "tag\n") == EOF)
	    error (1, errno, "writing to server");
        return get_responses_and_close ();
    }

    /* start the recursion processor */
    err = start_recursion (tag_fileproc, (int (*) ()) NULL, tag_dirproc,
			   (int (*) ()) NULL, argc, argv, local,
			   W_LOCAL, 0, 1, (char *) NULL, 1, 0);
    return (err);
}

/*
 * Called to tag a particular file (the currently checked out version is
 * tagged with the specified tag - or the specified tag is deleted).
 */
/* ARGSUSED */
static int
tag_fileproc (file, update_dir, repository, entries, srcfiles)
    char *file;
    char *update_dir;
    char *repository;
    List *entries;
    List *srcfiles;
{
    char *version, *oversion;
    char *rev;
    Vers_TS *vers;
    int retcode = 0;

    vers = Version_TS (repository, (char *) NULL, (char *) NULL, (char *) NULL,
		       file, 0, 0, entries, srcfiles);

    if (delete)
    {

	/*
	 * If -d is specified, "force_tag_match" is set, so that this call to
	 * Version_Number() will return a NULL version string if the symbolic
	 * tag does not exist in the RCS file.
	 * 
	 * This is done here because it's MUCH faster than just blindly calling
	 * "rcs" to remove the tag... trust me.
	 */

	version = RCS_getversion (vers->srcfile, symtag, (char *) NULL, 1);
	if (version == NULL || vers->srcfile == NULL)
	{
	    freevers_ts (&vers);
	    return (0);
	}
	free (version);

	run_setup ("%s%s -q -N%s", Rcsbin, RCS, symtag);
	run_arg (vers->srcfile->path);
	if ((retcode = run_exec (RUN_TTY, RUN_TTY, DEVNULL, RUN_NORMAL)) != 0)
	{
	    if (!quiet)
		error (0, retcode == -1 ? errno : 0,
		       "failed to remove tag %s from %s", symtag,
		       vers->srcfile->path);
	    freevers_ts (&vers);
	    return (1);
	}

	/* warm fuzzies */
	if (!really_quiet)
	{
	    if (update_dir[0])
		(void) printf ("D %s/%s\n", update_dir, file);
	    else
		(void) printf ("D %s\n", file);
	}

	freevers_ts (&vers);
	return (0);
    }

    /*
     * If we are adding a tag, we need to know which version we have checked
     * out and we'll tag that version.
     */
    version = vers->vn_user;
    if (version == NULL)
    {
	freevers_ts (&vers);
	return (0);
    }
    else if (strcmp (version, "0") == 0)
    {
	if (!quiet)
	    error (0, 0, "couldn't tag added but un-commited file `%s'", file);
	freevers_ts (&vers);
	return (0);
    }
    else if (version[0] == '-')
    {
	if (!quiet)
	    error (0, 0, "skipping removed but un-commited file `%s'", file);
	freevers_ts (&vers);
	return (0);
    }
    else if (vers->srcfile == NULL)
    {
	if (!quiet)
	    error (0, 0, "cannot find revision control file for `%s'", file);
	freevers_ts (&vers);
	return (0);
    }

    /*
     * As an enhancement for the case where a tag is being re-applied to a
     * large number of files, make one extra call to Version_Number to see if
     * the tag is already set in the RCS file.  If so, check to see if it
     * needs to be moved.  If not, do nothing.  This will likely save a lot of
     * time when simply moving the tag to the "current" head revisions of a
     * module -- which I have found to be a typical tagging operation.
     */
    rev = branch_mode ? RCS_magicrev (vers->srcfile, version) : version;
    oversion = RCS_getversion (vers->srcfile, symtag, (char *) NULL, 1);
    if (oversion != NULL)
    {
       int isbranch = RCS_isbranch (file, symtag, srcfiles);

       /*
	* if versions the same and neither old or new are branches don't have 
	* to do anything
	*/
       if (strcmp (version, oversion) == 0 && !branch_mode && !isbranch)
       {
	  free (oversion);
	  freevers_ts (&vers);
	  return (0);
       }
       
       if (!force_tag_move) {		/* we're NOT going to move the tag */
	  if (update_dir[0])
	     (void) printf ("W %s/%s", update_dir, file);
	  else
	     (void) printf ("W %s", file);

	  (void) printf (" : %s already exists on %s %s", 
			 symtag, isbranch ? "branch" : "version", oversion);
	  (void) printf (" : NOT MOVING tag to %s %s\n", 
			 branch_mode ? "branch" : "version", rev);
	  free (oversion);
	  freevers_ts (&vers);
	  return (0);
       }
       free (oversion);
    }

    run_setup ("%s%s -q -N%s:%s", Rcsbin, RCS, symtag, rev);
    run_arg (vers->srcfile->path);
    if ((retcode = run_exec (RUN_TTY, RUN_TTY, RUN_TTY, RUN_NORMAL)) != 0)
    {
	error (1, retcode == -1 ? errno : 0,
	       "failed to set tag %s to revision %s in %s",
	       symtag, rev, vers->srcfile->path);
	freevers_ts (&vers);
	return (1);
    }

    /* more warm fuzzies */
    if (!really_quiet)
    {
	if (update_dir[0])
	    (void) printf ("T %s/%s\n", update_dir, file);
	else
	    (void) printf ("T %s\n", file);
    }

    freevers_ts (&vers);
    return (0);
}

/*
 * Print a warm fuzzy message
 */
/* ARGSUSED */
static Dtype
tag_dirproc (dir, repos, update_dir)
    char *dir;
    char *repos;
    char *update_dir;
{
    if (!quiet)
	error (0, 0, "%s %s", delete ? "Untagging" : "Tagging", update_dir);
    return (R_PROCESS);
}